“35. … Thus, there can be only one application for variation of the original leave, and there can be only one decision (and, where applicable, one appeal). The possibility of a series of further applications leading to an indefinite extension of the original leave is excluded. However, by subs. (5) [of section 3C] it is possible to vary the one permitted application. If it is varied, any decision (and any further appeal) will relate to the application as varied. But once a decision has been made, no variation to the application is possible since there is nothing left to vary.”
“84 Grounds of appeal (1) An appeal under section 82(1) against an immigration decision must be brought on one or more of the following grounds- … (e) that the decision is otherwise not in accordance with the law; … 85 Matters to be considered (4) On an appeal under section 82(1) [of the NIAA] against a decision the Tribunal may consider evidence about any matter which [it] thinks relevant to the substance of the decision including evidence which concerns a matter arising after the date of the decision. (5) But subsection (4) is subject to the exception in section 85A. “85A Matters to be considered: new evidence: exceptions (3) Exception 2 applies to an appeal under section 82(1) if- (a) the appeal is against an immigration decision of a kind specified in section … 82(2)(d), (b) the immigration decision concerned an application of a kind identified in immigration rules as requiring to be considered under a “Points Based System”, and (c) the appeal relies wholly or partly on grounds specified in section 84(1) …(e) … (5) Where Exception 2 applies the Tribunal may consider evidence adduced by the applicant only if it- (a) was submitted in support of, and at the time of making, the application to which the immigration decision related, (b) relates to the appeal in so far as I relies on grounds other than those specified in subsection (3)(c), (c) is adduced to prove that a document is genuine or valid, or (d) is adduced in connection with the Secretary of State’s reliance on a discretion under immigration rules, to refuse an application on grounds not related to the acquisition of “points” under the “Points Based System”.”
“But once a decision has been made, no variation to the application is possible since there is nothing left to vary.”